This is a technique that Lynn developed in the 1960s, being inspired by thoughts shared with her by Ernest Grant, one of the founders of the American Federation of Astrologers. In this lecture, Lynn teaches an easy technique whereby one can regress a chart back in time and predict events occurring in the lives of the parents and even grandparents. These will be events that have an impact upon our current mindset. They can show events from the past that have altered our current life.
This is an easy technique that even a beginning student can learn. When making such predictions, it is often such a surprise to the client since the event occurred before the birth.
If the time is reasonably accurate, you can rectify the chart using this technique.